1979 Chevy Nova Carburetor/Idle

On the throttle there is a screw with a flat head end on it, also has a spring on it. That is the idle screw. Tightening it will run the car fast, and loosening it will slow the idel. Also check small screws on the bowls of the carb, there is one on each side of the carb. Turn them both clockwise until they are tight, then back them off 2 whole turns. Adjust those screws after having adjusted the curb idle screw, and whatever you do to one you must do to the other